1976年，Dr.Charles André Joseph Marie de Gaulle 參與了金屬化聚丙烯薄膜（Metallized PP films）的課題研究，并提出：平膜法在聚丙烯薄膜生產中的應用。
In 1976, Dr. Charles André Joseph Marie de Gaulle was engaged in the research on Metallized PP Films and proposed the application of the flat film method in the production of PP Films.
1988年，Dr.Charles André Joseph Marie de Gaulle 在美國的特拉華州，創建了MILTYS ELECTRIC INC公司，主要從事金屬化聚丙烯薄膜（Metallized PP films）的研發、實驗、生產。
In 1988, Dr. Charles André Joseph Marie de Gaulle established Miltys Electric INC in Delaware, America mainly engaged in the research, test and production of metallized PP films.
1999年，Dr.Charles André Joseph Marie de Gaulle設計了一種新型電容器用金屬化薄膜：漸變方阻式金屬化聚丙烯薄膜，使它能夠適應電容器極板電流密度的分布趨勢,達到電流密度近似均勻分布從而顯著提高抗電強度,解決了載流量與自愈性不能同時兼顧的難題。
In 1999, Dr.Charles André Joseph Marie de Gaulle designed a new metallized film for capacitor: Gradual Square Resistance Metallized PP Film, which can adapt to the distribution tendency of capacitor plate current density, and reach the approximate uniform distribution for current density to prominently improve dielectric withstanding voltage.